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Parasitoids of aphidophagous Syrphidae occurring in cabbage aphid [Brevicoryne brassicae L.] colonies on cabbage vegetables

100%

Jankowska B.

Journal of Plant Protection Research

2004

tom 44

nr 4

In 1993–1995 from the cabbage aphid colonies, fed on nine different varieties of Brassica oleracea L. syrphid larvae and pupae were collected. The remaining emerged adults of Syrphidae were classified to eight species. The parasitization varied within the years of observation and oscillated from 14,4% to 46,4%. Four parasitic Hymenoptera: Diplazon laetatorius (F.), Diplazon sp., Pachyneuron grande (Thoms.), and Syrphophagus aeruginosus (Dalm.) were reared. The parasitoids identified belong to the following three families Ichneumonidae, Pteromalidae, and Encyrtidae. The largest group of reared parasitoids belonged to the family Ichneumonidae of which the most frequent was Diplazon laetatorius (F.). It occurred in each year of observations. The parasitization by D. laetatorius reached 21,7%.

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The effectiveness of aphidophagous syrphid larvae [Diptera, Syrphidae] in the control of Aphis fabae Scop. [Homoptera, Aphidodea] on broad bean

80%

Wojciechowicz-Zytko E.

Journal of Plant Protection Research

2000

tom 40

nr 2

In the research of voracity of syrphid larvae it was found that the number of aphids Aphis fabae Scop. eaten by Iarvae oscillated between 300-800 specimens depending on the syrphid species. Larvae of Syrphus ribesii (L.) appearred to be the most voracious. lt was found that predator-prey ratio from 1 :25 to 1:50 was the most effective at Episyrphus balteatus (Deg.) and Sphaerophoria scripta (L.) larvae in Aphis fabae control on broad bean.

Ograniczanie wyników

2 Journal of Plant Protection Research

1 Jankowska B.

1 Wojciechowicz-Zytko E.

1 2004

1 2000

Wyniki wyszukiwania

Parasitoids of aphidophagous Syrphidae occurring in cabbage aphid [Brevicoryne brassicae L.] colonies on cabbage vegetables

The effectiveness of aphidophagous syrphid larvae [Diptera, Syrphidae] in the control of Aphis fabae Scop. [Homoptera, Aphidodea] on broad bean